What gums used as?? And products what its used in??
Gums are used to influence texture and mouthfeel, as well as water-binding and stabilization of crystallization properties of ice cream and confectionery products,

Natural, native gums are highly functional ingredients. What they contribute to??
They contribute to the texture, stability and other physical attributes of processed foods but sometimes they need physical or chemical modifications to extend functionality, or enable them to overcome various processing and shelf-life challenges.